Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method for displaying a plurality of colors in an electrophoretic display including an electrophoretic medium disposed between two electrodes, at least one of the electrodes being light-transmissive, the electrophoretic medium comprising a first species of white reflective particles, a second species of transmissive particles, and a third species of transmissive particles, wherein the first, second, and third particles are different in color and have different electrophoretic mobilities, the method comprising: driving the second species of transmissive particles adjacent the light-transmissive electrode and driving the first species of white reflective particles between the second and third species of transmissive particles to achieve a first color; driving the third species of transmissive particles adjacent the light-transmissive electrode and driving the first species of white reflective particles between the second and third species of transmissive particles to achieve a second color; and driving the first, second, and third particles away from the light-transmissive electrode to achieve a third color.
A method for displaying multiple colors in an electrophoretic display, which has an electrophoretic medium (the color display material) between two electrodes (electrical contacts). At least one electrode is transparent to allow viewing. The medium contains three types of particles: white reflective particles, transmissive particles of a second color, and transmissive particles of a third color. These particles have different colors and move at different speeds in an electric field. The method involves: moving the second-color particles to the transparent electrode and positioning the white particles between the second and third-color particles to show a first color; moving the third-color particles to the transparent electrode and positioning the white particles between the second and third-color particles to show a second color; and moving all three particle types away from the transparent electrode to show a third color.
2. The method of claim 1 , wherein the second and third species of particles are cyan and magenta, respectively, in color.
The multi-color electrophoretic display method, which displays colors using reflective white particles, transmissive particles of a second color, and transmissive particles of a third color, involves the second-color particles being cyan and the third-color particles being magenta. The method comprises: driving the cyan particles adjacent to the light-transmissive electrode and driving the white reflective particles between the cyan and magenta particles to achieve a first color; driving the magenta particles adjacent to the light-transmissive electrode and driving the white reflective particles between the cyan and magenta particles to achieve a second color; and driving the white, cyan, and magenta particles away from the light-transmissive electrode to achieve a third color. This combines to create a CMY subtractive color display.
3. The method of claim 1 , wherein the first species of reflective particles are white in color.
The multi-color electrophoretic display method, which displays colors using reflective particles, transmissive particles of a second color, and transmissive particles of a third color, involves the first reflective particles being white in color. The method comprises: driving the second color transmissive particles adjacent the light-transmissive electrode and driving the white reflective particles between the second and third color transmissive particles to achieve a first color; driving the third color transmissive particles adjacent the light-transmissive electrode and driving the white reflective particles between the second and third color transmissive particles to achieve a second color; and driving the white, second color, and third color particles away from the light-transmissive electrode to achieve a third color.
4. The method of claim 1 , further comprising driving the first species of reflective particles adjacent the light-transmissive electrode to achieve a fourth color.
The multi-color electrophoretic display method for displaying colors using reflective white particles, transmissive particles of a second color, and transmissive particles of a third color, not only moves the second and third color particles to the transparent electrode but also moves the white reflective particles to the transparent electrode to create a fourth color. The method comprises: driving the second color transmissive particles adjacent the light-transmissive electrode and driving the white reflective particles between the second and third color transmissive particles to achieve a first color; driving the third color transmissive particles adjacent the light-transmissive electrode and driving the white reflective particles between the second and third color transmissive particles to achieve a second color; driving the white, second, and third color particles away from the light-transmissive electrode to achieve a third color; and additionally driving the white reflective particles adjacent the light-transmissive electrode to achieve a fourth color.
5. An electronic book reader, portable computer, tablet computer, cellular telephone, smart card, sign, watch, shelf label or flash drive incorporating the method of claim 1 .
An electronic device such as an e-reader, laptop, tablet, smartphone, smart card, sign, watch, shelf label, or USB flash drive incorporates a multi-color electrophoretic display method that uses an electrophoretic medium between two electrodes. At least one electrode is transparent. The medium contains white reflective particles, transmissive particles of a second color, and transmissive particles of a third color, all with different electrical mobility. The display shows colors by moving the second-color particles to the transparent electrode and positioning the white particles between the second and third-color particles to show a first color; moving the third-color particles to the transparent electrode and positioning the white particles between the second and third-color particles to show a second color; and moving all three particle types away from the transparent electrode to show a third color.
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November 28, 2017
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